In Classical Greek mythology, Eris was the goddess of strife and chaos. She was not invited to the wedding of Peleus and Thetis, so she tossed an apple marked 'For The Fairest'1) in the middle of the party 2). This, needless to say, caused the goddesses Aphrodite, Hera, and Artemis3) to all claim it and through that start the Trojan War which killed a whole bunch of people.4)

On Improbable Island, Eris appears to be a middle-aged, attractive frosted blonde with glasses and a red turtleneck who follows people around, taking notes in a stenographer's notebook and giggling a lot.5)